District/Unitary Authority

This is a modern unit which was reported on by the 2011
census. Most of our historical statistics were originally gathered for
units with quite different boundaries. To give you a clear picture of
long-run change, we have used our detailed information on boundaries
and population distribution to redistrict
the historical statistics to the modern units.
More details here.

We have created these time series for the modern local authority area
by using a Geographical Information System to re-district
statistics for a variety of historical units which covered the same area.